The trio of bombings at a busy market wounded another 130 people on Loulou Fou, an island in Lake Chad, said Gen. Banyaman Cossingar, Chad's gendarmerie director general.

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Officials previously said the blasts killed 27 people but later reduced the death toll.

Cossingar said he suspects Nigeria-based terror group Boko Haram is behind the attack, although the extremists have not claimed responsibility for the slaughter.

Officials put the region in a state of emergency last month after a wave of attacks by Boko Haram terrorists.

Earlier this year, the militant group overran another Lake Chad island, Karamga. Niger's army has fought to retake the terror-controlled island.

The terror group, whose 6-year uprising has killed some 20,000 people, has targeted Lake Chad's islands, which lie in dense swampland, because they are an ideal base for mounting surprise attacks on the countries bordering the lake: Chad, Cameroon, Niger and Nigeria.